abstract：:Secondary cavity nesting (SCN) birds breed in holes that they do not excavate themselves. This is possible where there are large trees whose size and age permit the digging of holes by primary excavators and only rarely happens in forest plantations, where we expected a deficit of both breeding holes and SCN species. ...

journal_title：PeerJ

authors： Cuatianquiz Lima C,Macías Garcia C

更新日期：2016-03-15 00:00:00

abstract：:In this work, we studied the main characteristics of flowering, reproductive system and diversity of pollinators for the biofuel plant Jatropha curcas (L.) in a site of tropical southeastern Mexico, within its center of origin. The plants were monoecious with inflorescences of unisexual flowers. The male flowers produ...

journal_title：PeerJ

authors： Rincón-Rabanales M,Vargas-López LI,Adriano-Anaya L,Vázquez-Ovando A,Salvador-Figueroa M,Ovando-Medina I

更新日期：2016-03-14 00:00:00

abstract：:Soil microbial communities are continuously exposed to H2 diffusing into the soil from the atmosphere. N2-fixing nodules represent a peculiar microniche in soil where H2 can reach concentrations up to 20,000 fold higher than in the global atmosphere (0.530 ppmv). In this study, we investigated the impact of H2 exposur...

journal_title：PeerJ

authors： Piché-Choquette S,Tremblay J,Tringe SG,Constant P

更新日期：2016-03-10 00:00:00

abstract：:Background. Applying quantitative morphological approaches in systematics research is a promising way to discover cryptic biological diversity. Information obtained through twenty-first century science poses new challenges to taxonomy by offering the possibility of increased objectivity in independent and automated hy...

journal_title：PeerJ

authors： Csősz S,Fisher BL

更新日期：2016-03-10 00:00:00

abstract：:Deposits spanning the Radotruncana calcarata Taxon Range Zone at the Postalm section, Northern Calcareous Alps (Austria) are examined quantitatively for foraminiferal assemblages, especially the planktonic group. This study focuses on establishing a high resolution record spanning an 800 ka long stratigraphic interval...

journal_title：PeerJ

authors： Wolfgring E,Wagreich M

更新日期：2016-03-08 00:00:00

abstract：:Biological carbon sequestration by forest ecosystems plays an important role in the net balance of greenhouse gases, acting as a carbon sink for anthropogenic CO2 emissions. Nevertheless, relatively little is known about the abiotic environmental factors (including climate) that control carbon storage in temperate and...

journal_title：PeerJ

authors： Duchesne L,Houle D,Ouimet R,Lambert MC,Logan T

更新日期：2016-03-03 00:00:00

abstract：:Background. Child undernutrition and flooding are highly prevalent public health issues in many developing countries, yet we have little understanding of preventive strategies for effective coping in these circumstances. Education has been recently highlighted as key to reduce the societal impacts of extreme weather e...

journal_title：PeerJ

authors： Rodriguez-Llanes JM,Ranjan-Dash S,Mukhopadhyay A,Guha-Sapir D

更新日期：2016-03-01 00:00:00

abstract：:The ubiquitin-proteasome system targets misfolded proteins for degradation. Since the accumulation of such proteins is potentially harmful for the cell, their prompt removal is important. E3 ubiquitin-protein ligases mediate substrate ubiquitination by bringing together the substrate with an E2 ubiquitin-conjugating e...

journal_title：PeerJ

authors： Boomsma W,Nielsen SV,Lindorff-Larsen K,Hartmann-Petersen R,Ellgaard L

更新日期：2016-02-25 00:00:00

abstract：:Background. There has been a continual increase in injury rates in cricket, with hamstring strain injuries (HSIs) being the most prominent. Eccentric knee flexor weakness and bilateral asymmetries are major modifiable risk factors for future HSIs. However, there is a lack of data relating to eccentric hamstring streng...

journal_title：PeerJ

authors： Chalker WJ,Shield AJ,Opar DA,Keogh JW

更新日期：2016-02-18 00:00:00

abstract：:MicoRNAs (miRNAs), usually as gene regulators, participate in various biological processes, including stress responses. The hypothalamus-pituitary-adrenal axis (HPA axis) is an important pathway in regulating stress response. Although the mechanism that HPA axis regulates stress response has been basically revealed, t...

journal_title：PeerJ

authors： Luo W,Fang M,Xu H,Xing H,Fu J,Nie Q

更新日期：2016-02-18 00:00:00

abstract：:Movement is one of the most important epigenetic factors for normal development of the musculoskeletal system, particularly during genesis and joint development. Studies regarding alterations to embryonic mobility, performed on anurans, chickens and mammals, report important phenotypical similarities as a result of th...

journal_title：PeerJ

authors： Ponssa ML,Abdala V

更新日期：2016-02-18 00:00:00

abstract：:Ischemia postconditioning (IPo) is a promising strategy in reducing myocardial ischemia reperfusion (I/R) injury (MIRI), but its specific molecular mechanism is incompletely understood. Langendorff-perfused isolated rat hearts were subjected to global I/R and received IPo in the absence or presence of the mitochondria...

journal_title：PeerJ

authors： Cao S,Liu Y,Wang H,Mao X,Chen J,Liu J,Xia Z,Zhang L,Liu X,Yu T

更新日期：2016-02-16 00:00:00

abstract：:Background. Hand function is essential to a person's self-efficacy and greatly affects quality of life. Adapted utensils with handles of increased diameters have historically been used to assist individuals with arthritis or other hand disabilities for feeding, and other related activities of daily living. To date, mi...

journal_title：PeerJ

authors： McDonald SS,Levine D,Richards J,Aguilar L

更新日期：2016-02-15 00:00:00

abstract：:Mathematical models of collective cell movement often neglect the effects of spatial structure, such as clustering, on the population dynamics. Typically, they assume that individuals interact with one another in proportion to their average density (the mean-field assumption) which means that cell-cell interactions oc...

journal_title：PeerJ

authors： Binny RN,Haridas P,James A,Law R,Simpson MJ,Plank MJ

更新日期：2016-02-15 00:00:00

abstract：:Background. Research addressing distinctions and similarities between people's malevolent character traits (i.e., the Dark Triad: Machiavellianism, narcissism, and psychopathy) has detected inconsistent linear associations to temperament traits. Additionally, these dark traits seem to have a common core expressed as u...

journal_title：PeerJ

authors： Garcia D,Rosenberg P

更新日期：2016-02-08 00:00:00

abstract：:Transmissible gastroenteritis virus (TGEV), belonging to the coronaviridae family, is the key cause of the fatal diarrhea of piglets and results in many pathological processes. microRNAs (miRNAs) play a key role in the regulation of virus-induced apoptosis. During the process of apoptosis induced by TGEV infection in ...

journal_title：PeerJ

authors： Zhao X,Song X,Bai X,Fei N,Huang Y,Zhao Z,Du Q,Zhang H,Zhang L,Tong D

更新日期：2016-02-04 00:00:00

abstract：:Here we provide evidence to support an extension of the recognized distributional range of the Mountain Elaenia (Elaenia frantzii) to include southern Mexico. We collected two specimens in breeding condition in northwestern Sierra Norte de Chiapas, Mexico. Morphologic and genetic evidence support their identity as Ela...

journal_title：PeerJ

authors： Hanna ZR,Ortiz-Ramírez MF,Ríos-Muñoz CA,Cayetano-Rosas H,Bowie RC,Navarro-Sigüenza AG

更新日期：2016-02-01 00:00:00

abstract：:The rapidly changing climate makes humans realize that there is a critical need to incorporate climate change adaptation into conservation planning. Whether the wintering habitats of Great Bustards (Otis tarda dybowskii), a globally endangered migratory subspecies whose population is approximately 1,500-2,200 individu...

journal_title：PeerJ

authors： Mi C,Falk H,Guo Y

更新日期：2016-02-01 00:00:00

abstract：BACKGROUND:In previous studies, both 17β-estradiol (E2) and resveratrol (RES) were reported to protect intervertebral disc cells against aberrant apoptosis. Given that E2 has a better anti-apoptotic effect with more cancer risk and RES has an anti-apoptotic effect with less cancer risk, the combined use of E2 with RES ...

journal_title：PeerJ

authors： Yang SD,Ma L,Yang DL,Ding WY

更新日期：2016-01-26 00:00:00

abstract：:Although anthophilous Coleoptera are regarded to be unspecialised flower-visiting insects, monkey beetles (Scarabaeidae: Hopliini) represent one of the most important groups of pollinating insects in South Africa's floristic hotspot of the Greater Cape Region. South African monkey beetles are known to feed on floral t...

journal_title：PeerJ

authors： Karolyi F,Hansal T,Krenn HW,Colville JF

更新日期：2016-01-21 00:00:00

abstract：:Non-invasive measurements of glucocorticoid (GC) concentrations, including cortisol and corticosterone, serve as reliable indicators of adrenocortical activities and physiological stress loads in a variety of species. As an alternative to invasive analyses based on plasma, GC concentrations in saliva still represent s...

journal_title：PeerJ

authors： Nemeth M,Pschernig E,Wallner B,Millesi E

更新日期：2016-01-18 00:00:00

abstract：:Introduction. Colorectal cancer is one of the most frequent cancers in the world and liver metastases are seen in up to 19% of patients with colorectal cancers. Detection of liver metastases is not only vital for sufficient treatment and survival, but also for a better estimation of prognosis. The aim of this study wa...

journal_title：PeerJ

authors： Achiam MP,Løgager VB,Skjoldbye B,Møller JM,Lorenzen T,Rasmussen VL,Thomsen HS,Mollerup TH,Okholm C,Rosenberg J

更新日期：2016-01-14 00:00:00

abstract：:Synechococcus is among the most important contributors to global primary productivity. The genomes of several strains of this taxon have been previously sequenced in an effort to understand the physiology and ecology of these highly diverse microorganisms. Here we present a comparative study of Synechococcus genomes. ...

journal_title：PeerJ

authors： Coutinho F,Tschoeke DA,Thompson F,Thompson C

更新日期：2016-01-14 00:00:00

abstract：:Here we review the systematics of the threadsnakes of the Epictia goudotii Species complex in Middle and northern South America using external morphology and molecular data. Two species, Epictia goudotii and E. magnamaculata, are currently recognized from that region, but we provide evidence for recognizing, as specie...

journal_title：PeerJ

authors： McCranie JR,Hedges SB

更新日期：2016-01-12 00:00:00

abstract：BACKGROUND:The purpose of this study is to provide a report on scientific production during the period 2010-2014 in order to identify the major topics as well as the predominant actors (journals, countries, continents) involved in the field of eye disease. METHODS:A PubMed search was carried out to extract articles re...

journal_title：PeerJ

authors： Boudry C,Denion E,Mortemousque B,Mouriaux F

更新日期：2016-01-07 00:00:00

abstract：:The interconversion of hexose-6-phosphate and hexose-1-phosphate can be directly analyzed by high-performance anion-exchange chromatography coupled with an electrochemical detector (HPAEC-PAD). Thus, this method can be used to measure the activities of N-acetylglucosamine-phosphate mutase (AGM), glucosamine-phosphate ...

journal_title：PeerJ

authors： Jia X,Kang J,Yin H

更新日期：2016-01-05 00:00:00

abstract：:The systematic relationships of taxa traditionally referred to as 'basal ornithopods' or 'hypsilophodontids' remain poorly resolved since it was discovered that these taxa are not a monophyletic group, but rather a paraphyletic set of neornithischian taxa. Thus, even as the known diversity of these taxa has dramatical...

journal_title：PeerJ

authors： Boyd CA

更新日期：2015-12-22 00:00:00

abstract：:Substantial evidence has shown that most exogenous substances are metabolized by multiple cytochrome P450 (P450) enzymes instead of by merely one P450 isoform. Thus, multi-P450 inhibition leads to greater drug-drug interaction risk than specific P450 inhibition. Herein, we innovatively established an artificial neural...

journal_title：PeerJ

authors： Li Z,Li Y,Sun L,Tang Y,Liu L,Zhu W

更新日期：2015-12-21 00:00:00

abstract：:Seabed mapping can quantify the extent of benthic habitats that comprise marine ecosystems, and assess the impact of fisheries on an ecosystem. In this study, the distribution of seabed habitats in a proposed no-take Marine Reserve along the northeast coast of Great Barrier Island, New Zealand, was mapped using underw...

journal_title：PeerJ

authors： Lee ST,Kelly M,Langlois TJ,Costello MJ

更新日期：2015-12-10 00:00:00

abstract：:Current ovarian cancer treatment involves chemotherapy that has serious limitations, such as rapid clearance, unfavorable biodistribution and severe side effects. To overcome these limitations, drug delivery systems (DDS) have been developed to encapsulate chemotherapeutics for delivery to tumor cells. However, no sys...

journal_title：PeerJ

authors： Raavé R,de Vries RB,Massuger LF,van Kuppevelt TH,Daamen WF

更新日期：2015-12-10 00:00:00

abstract：:In this paper, we propose a method for automatically detecting the times during which game players exhibit specific behavior, such as when players commonly show excitement, concentration, immersion, and surprise. The proposed method detects such outlying behavior based on the game players' characteristics. These chara...

journal_title：PeerJ

authors： Kim YB,Kang SJ,Lee SH,Jung JY,Kam HR,Lee J,Kim YS,Lee J,Kim CH

更新日期：2015-12-10 00:00:00

abstract：:Complete, articulated crinoids from the Ordovician peri-Gondwanan margin are rare. Here, we describe a new species, Iocrinus africanus sp. nov., from the Darriwilian-age Taddrist Formation of Morocco. The anatomy of this species was studied using a combination of traditional palaeontological methods and non-destructiv...

journal_title：PeerJ

authors： Zamora S,Rahman IA,Ausich WI

更新日期：2015-12-07 00:00:00

abstract：:Mechanical ventilation (MV) of patients can cause damage to bronchoalveolar epithelium, leading to a sterile inflammatory response, infection and in severe cases sepsis. Limited knowledge is available on the effects of MV on the innate immune defense system in the human lung. In this study, we demonstrate that cyclic ...

journal_title：PeerJ

authors： Karadottir H,Kulkarni NN,Gudjonsson T,Karason S,Gudmundsson GH

更新日期：2015-12-07 00:00:00

abstract：:Background. Physical activity is important for children's physical, mental, and social well-being. Outdoor active play is an important yet unstudied domain of children's physical activity. The objective of this study was to determine if parental encouragement is associated with the frequency that children engage in ou...

journal_title：PeerJ

authors： Ferrao T,Janssen I

更新日期：2015-11-30 00:00:00

abstract：:Defensive traits exhibited by plants vary widely across populations. Heritable phenotypic differentiation is likely to be produced by genetic drift and spatially restricted gene flow between populations. However, spatially variable selection exerted by herbivores may also give rise to differences among populations. To...

journal_title：PeerJ

authors： Castillo G,Valverde PL,Cruz LL,Hernández-Cumplido J,Andraca-Gómez G,Fornoni J,Sandoval-Castellanos E,Olmedo-Vicente E,Flores-Ortiz CM,Núñez-Farfán J

更新日期：2015-11-26 00:00:00

abstract：:In functional genomics experiments, researchers often select genes to follow-up or validate from a long list of differentially expressed genes. Typically, sharp thresholds are used to bin genes into groups such as significant/non-significant or fold change above/below a cut-off value, and ad hoc criteria are also used...

journal_title：PeerJ

authors： Lazic SE

更新日期：2015-11-26 00:00:00

abstract：:Seasonal upwelling at the northern Pacific coast of Costa Rica offers the opportunity to investigate the effects of pronounced changes in key water parameters on fine-scale dynamics of local coral reef communities. This study monitored benthic community composition at Matapalo reef (10.539°N, 85.766°W) by weekly obser...

journal_title：PeerJ

authors： Stuhldreier I,Sánchez-Noguera C,Roth F,Jiménez C,Rixen T,Cortés J,Wild C

更新日期：2015-11-24 00:00:00

abstract：:Hydrozoans display the most morphological diversity within the phylum Cnidaria. While recent molecular studies have provided some insights into their evolutionary history, sister group relationships remain mostly unresolved, particularly at mid-taxonomic levels. Specifically, within Hydroidolina, the most speciose hyd...

journal_title：PeerJ

authors： Kayal E,Bentlage B,Cartwright P,Yanagihara AA,Lindsay DJ,Hopcroft RR,Collins AG

更新日期：2015-11-19 00:00:00

abstract：:We examined whether chemically mediated risk perception by prey and the effects of changes in prey behavior on basal resources vary as a function of the amount of prey biomass consumed by the predator. We studied these issues using a tritrophic system composed of blue crabs, Callinectes sapidus (top predator), mud cra...

journal_title：PeerJ

authors： Weissburg M,Beauvais J

更新日期：2015-11-19 00:00:00

abstract：:Background. Two non-tuberculous mycobacterial strains, UM_3 and UM_11, were isolated from the trunk wash of captive elephants in Malaysia. As they appeared to be identical phenotypes, they were investigated further by conventional and whole genome sequence-based methods of strain differentiation. Methods. Multiphasic ...

journal_title：PeerJ

authors： Chan KG,Loke MF,Ong BL,Wong YL,Hong KW,Tan KH,Kaur S,Ng HF,Abdul Razak M,Ngeow YF

更新日期：2015-11-10 00:00:00